Exhaust valve cooling assembly



Oct. 27, 1953 C. W. GALUSKA EXHAUST VALVE COOLING ASSEMBLY Filed Sept.30, 1952 Fig. 2-

Charles W. Gall/ska mmvroa BY Wang; 8%

Patented Get. 27, 1953 EXHAUST VALVE COOLING ASSEMBLY Charles W.Galuska, Burbank, Calif., assignor of fifty per cent to Lois Edwards,Burbank, Calif.

Application September 30, 1952, Serial No. 312,371 4 Claims. (Cl.123-4117) This invention comprises novel and useful improvements in anexhaust valve cooling assembly and more specifically pertains to adevice for supplying a cooling fluid to the undersurface of the exhaustvalve and to the exhaust valve port and exhaust passages of an internalcombustion engine during that period when the exhaust valve is in itsclosed position.

The primary object of this invention is to provide a cooling systemwhereby a cooling fluid may be supplied to the undersurface of anexhaust Valve when the latter is closed and whereby the cooling fluidpassage is closed from communication with the exhaust valve port whenthe exhaust valve is in its open position.

A further object of the invention is to provide a cooling assembly inaccordance with the preceding objects wherein a valve controlling theflow of coolant is operated in synchronization with and is operatedautomatically by the movement of the engine exhaust valve.

These, together with various and selected features and objects of theinvention, which will later become apparent as the following descriptionproceeds, are attained by the present invention, a preferred embodimentof which has been illustrated, by way of example only, in theaccompanying drawings, wherein:

Figure 1 is a fragmentary vertical sectional view through a portion ofthe cylinder of an internal combustion engine showing the exhaust valveassembly of the same and showing the cooling device in accordance withthis invention applied thereto, the exhaust valve being shown in itsclosed position and the coolant valve being open to permit flow of thecooling fluid into the exhaust port, against the undersurface of theexhaust valve and into the exhaust passage of the engine;

Figure 2 is a view similar to Figure 1 but showing the position of theparts when the exhaust valve is open, the coolant valve being closed;

Figure 3 is an enlarged detail view of the coolant valve assembly of theinvention.

Referring now more specifically to the accompanying drawings, where likenumerals designate similar parts throughout the various views, it willbe seen that numeral m designates generally a cylinder of an internalcombustion engine having an exhaust passage [2 with an exhaust port Ittherein controlled by an exhaust valve it of conventional design.

In accordance with this invention there is provided a conduit 18 for acooling fluid which conduit communicates with the exhaust port I4.

2 As illustrated, the conduit I8 extends through the cylinder head 20 ofthe engine and is connected. by a tube 22 with any suitable source ofcoolantv fluid under pressure, as for example, compressed air, liquid orany other gaseous or liquid fluid.

Referring now especially to Figure 3, it will be seen that the coolantconduit I8 is provided with a valve seat 22 which may be in the form ofa conical member whose base is screw-threadedly engaged as at 24, withthe internal walls of the coolant conduit, and which member is providedwith suitable preparations. A coolant control valve 28, which may be ofthe poppet valve character and. is provided with a conical head atcooperating with the conical seat in the member 22, is provided. Thisvalve has a guide stem 32 and an actuating valve stem 34. The formerextends through a guide bore 36 in a uide member 38 which is externallythreaded as at in for engagement in the coolant conduit I8. Suitablepassages or apertures 42, extending through the guide member 38, permitthe flow of the coolant fluid past the guide member. The stem 32 of thevalve extends through the bore 36 whereby the coolant valve is guidedfor reciprocatory movement in the coolant conduit. A compression spring44 surrounds the valve stem 32 and is disposed between the valve head 28and the guide member 38 to yieldingly urge the valve into a coolant portclosing position, as shown in Figure 3, whereby the valve head 30 willclose the apertures 26 and prevent passage of coolant fluid into theexhaust port I4.

The apex of the conical member 22 is provided with an apertured bore 46through which extends and is guided the operating stem 34. The latterextends down into the exhaust port l4 and into position to be engaged bythe undersurface of the valve head 16 of the exhaust valve when thelatter is at or approaches its closed position. The adjustment of theparts is such that, when the exhaust valve is closed, as shown in Figure1, the undersurface of the exhaust valve head It will engage the stem 34and lift coolantvalve 23 from its seat whereby coolant fluid underpressure will flow through the conduit [8, through the exhaust port l4,will cool the undersurface of the closed exhaust valve, as well as thevalve passage l2, and will be discharged into the exhaust system of theengine. When, however, the exhaust valve is open, as shown in Figure 2,the movement of the exhaust valve away from its seat will also disengagethe same from the end of the valve stem 34, whereby the spring 44 aswell as the pressure prevailing in the coolant conduit l 8 will seat thecoolant valve and prevent flow of coolant fluid as well as flow of gasesfrom within the cylinder l into the coolant conduit.

By this arrangement it is seen that coolant fluid is automaticallysupplied under pressure for cooling the exhaust valve of an internalcombustion engine when the latter is on its seat. Effective cooling isthus provided for any wasteful flow ot. coolant. is. avoided.

From .the foregoing, the construction and operation of the device willbe readily understood and further explanation is believed to beunnecessary. However, since numerous'modiflcations' and changes willreadily occur to. those skilledin the art, it is not desired to limitthe. invention to: the exact construction shown and described, andaccordingly all suitable modifications" and equivalents may be resortedto, falling withinlthe-scopeof the appended claims.

Having. described. the invention, what-is claimed as new. is:

L, A cooling. system for the exhaust valve. of an internal combustion.comprising a conduit con nected toa. sourceof. cooling. fluid and to theexhaust portv of? an. internal combustion engine, valve means.controlling flow through said. con.- duit,,means.for synchronizing;movement. of said. valve means. to. movement of. said. exhaust. valvewhereby cooling, fluid isadmitted to said exhaust valve portwhen the:exhaust valve is closed, said, lastmeans being, actuated-b the head ofthe ex? haust. valve.

2. A. cooling systemcfor theexhaust valve of aninternalv combustion.comprising, a conduit con nected toasource oi cooling- .fluid-andio theex-- haust port oiv an internal combustion engine,.

valve means controlling flowthrough said con.- duit means-iQrsynchronizing movement of said valve-meansto movement of said exhaustvalve whereby cooling fluid-is admitted to said exhaust valve port whenthe exhaustvalve is closed, said r 4 last means comprising a stem onsaid valve means extending into said exhaust port and engageable by saidexhaust valve in the closed position of the latter.

3. A cooling system for the exhaust valve of an internal combustioncomprising a conduit con nected to a source of cooling fluid and to theexhaust port of an internal combustion engine, valve means controllingflow through said conduit. means; for synchronizing movement of saidvalve means to movement of said exhaust Valve whereby cooling fluid isadmitted to said exhaust valve port when the exhaust valve is closed,said valve means including a normally closed poppet valvehaving a stemsaid stem extending into said exhaustport andbeing engaged by saidexhaust valve ,for opening the poppet valve when the exhaust valve is"closed.

4; A cooling system for the exhaust valve of an in temal combustioncomprising a conduit connected to. a source of cooling fluid and to theexhaust port of an internal combustion engine, valve means controllingflow through said conduit, means for synchronizing movement of saidvalve means to movement of said exhaust valve whereby eoolingfluid isadmitted to said exhaust valvepont. when the exhaust valve is closed,said valve means including a normally closed poppet valve havinga stem,said stem extendinginto said exhaust port. and being engaged by saidexhaust valvefor opening the poppet valve when the exhaust. valve isclosed, av spring. in said conduit urging. saicl' poppet. valve. toclosed position.

CHARLES W. GALUSKA.

References Cited in the fileof this patent UNITED STATES PATENTS NumberName- Date l,87'3',1-'-19' Griswold Aug. 23, 193-2- 2',065,106 SymonsDec. 22, 1936 2,175,261 Harbaugh Oct. 10, 1939'-

